Improvement in reversible window-sashes



1. MCNAMEE Reversible Window-Sashes.

Patented July 14,1874.

JOHN MGNAMEE, OF PHILADELPHIA, PENNSYLVANIA.

IMPROVEMENT IN REVERSIBLE WINDOW-SASHES.

Specification forming part of Letters Patent No. 153,100,

dated `Inly 14, 1874; application filed June 17, 1874.

To all whom it may concern: Be it known that I, JOHN MCNAMEE, of thecity and county of Philadelphia, State of Pennsylvania, have inventedcertain Improvements in Reversible IVindow Sashes, of which thefollowing is a specification:

The object of my invention is to facilitate the reversal ofwindow-sashes in their frames, for purposes of cleansing and reglazing,and this object I attain by providing the sash A, at its oppositegrooved edges, with strips B B, which admit of beingadvaneed andretracted, and which are adapted to grooves in the window-frame D, andpivoted to trunnions a a, capable of being raised and lowered in theframe, upon which trunnions the said strips, when retracted, can beturned for the purpose of reversing the sash, all as shown in theperspective view, Figure l, and sectional eleva-tion, Fig. 2, of theaccompanying drawing. v

Thestrips B B are adapted to grooves b, formed* for their reception inthe opposite edges of the sash, and are acted on, aboveand below, bysprings el and d', tending to force them outwardand into theguidinggrooves e of the window-frame, the strips being secured, at theirupper and lower ends, to plates ff, which can be moved upon the top andbottom of the sash to a limited extent. Each plate j' is slotted at Itfor the passage of a guiding-screw, i, to which is hung a cam lever, j,the latter acting upon a ila1ige,j",of the plate to force and hold backthe same and its strip B when adjusted to theposition shown at theright-hand side of Figs. 1 and 2, but permitting the said plate and itsstrip to slide outward, owing to the action of the springs, whenadjusted to the reverse position shown at the left-hand side of saidfigures.

Each strip B is pivoted, at the center of its length, to a trunnion, a,upon which it can be freely turned when retracted, the said trunnionbeing secured to a plate, a', arranged to slide in an internal groove ofthe windowframe, as shown in the sectional plan view, Fig. 3, or being.suspended from a cord, if a balancingweight is used.

The strips B B may be incased in sheet metal, or otherwise strengthenedat the point where theyr are cut away for the trunnions and plates a, orweightcords.

l/Vhen the strips B B are advanced from the edges of the sash, and intothe guidinggrooves of the window-frame, the said sash can be freelyraised and lowered; and when 'it is necessary toreverse the sash in theframe in order to obtain ready access to its exterior for cleansin gpurposes or for reglazing, it is only necessary to turn the severalcamlevers jatlthe top and bottom ot the sash to the position shown, atthe right-hand side of Figs. l and 2, thereby retracting the strips Binto the grooved edges of the sash sufficiently to clear the grooves inthe window frame, when the said strips can be turned on their trunnions.

In a window unprovided with the balancing-weights the strips B may bemade to serve as retainers, for holding the sash in any position towhich it is adjusted, by simply using springs l of sufficient strengthto cause the said strips to bind against the window-frame. In this case,however, it will be necessary to strengthen therlo-wer springs only, theupper springs being just sufficiently strong to force the strips outwardinto the -grooves of the frame. P

I claim as my invention- 1. The colnbination, with a wiiulow-frame, D,of a sash, A, provided at its opposite grooved edges with strips B,which are pivoted to, and admit of being' advanced and retracted upon,movable trunnions a a, substantially as and for the purpose specified.

2. The combination of the stripsBB, springs d d, acting to force outsaid strips, and camlevers j, arranged at the edges of the sash to drawthe strips inward, all as set forth.

In testimony whereof I have signed myname to this specification in thepresence of two subscribing witnesses.

JOHN lIIoNf/UI'IEE.

Witnesses WM. A. STEEL, J. S. Sme-ER.

